Since nobody is born with lack of self confidence an individual must do an extra effort so as to lose the self confidence he already has.
Individuals who lack self confidence are the ones who often Misinterpret events and so feel much less assured as time passes, for instance:

1) When someone glances at them they rapidly attribute this to being less worthy, uninteresting or defective
2) When someone doesn�t say hello they quickly assume that he did so because he doesn�t like them
3) When someone rejects them they rapidly assume that rejection occurred because they are much less desirable or unattractive
four) When people keep silent they assume that they are judging them negatively

And so on, I may give hundreds of related examples
Now as the person who thinks that method encounters totally different conditions his self confidence goes lower and lower
This person has a built in mechanism for decreasing self confidence and that�s why after some time passes the effect of the recommendation he got fades away.

So how to christmas sweaters shirts essentially construct self confidence?

In order to build self confidence you want to interrupt these self confidence lowering patterns by doing the next:

1) Learn how to watch your thoughts so that you spot the patters
2) Problem these patterns as soon as you encounter them

lets suppose that you just have been passing by 2 people who had been whispering to each other, if in this case you thought that they are making enjoyable of you then you should challenge your ideas by asking your self these questions

why do I consider they are making fun of me?
Couldn�t they be trying towards my path christmas sweaters shirts by coincidence?
Couldn�t they be thinking of something else?
Couldn�t they be saying that I appear to be one in all their buddies?
Couldn�t they be speaking about my t-shirt because one of them owns a similar one?
Why did I ignore all of those prospects and deal with the only detrimental one??

As you keep challenging your unfavourable considering patterns that method it is possible for you to to break them and your self confidence won�t go lower with every new social encounter.